21555443

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{137}}^1$

素因数の和:196

約数の個数: 36

約数和(自身を含む): 28789560

約数和(自身を除く): 7234117

約数列:

[1, 7, 13, 19, 49, 91, 133, 137, 169, 247, 637, 931, 959, 1183, 1729, 1781, 2603, 3211, 6713, 8281, 12103, 12467, 18221, 22477, 23153, 33839, 87269, 127547, 157339, 162071, 236873, 439907, 1134497, 1658111, 3079349, 21555443]

約数ペア:

[(1, 21555443), (7, 3079349), (13, 1658111), (19, 1134497), (49, 439907), (91, 236873), (133, 162071), (137, 157339), (169, 127547), (247, 87269), (637, 33839), (931, 23153), (959, 22477), (1183, 18221), (1729, 12467), (1781, 12103), (2603, 8281), (3211, 6713)]